Indexes set to open higher as oil recovers slightly

U.S. stock indexes were set to open higher on Tuesday as oil edged up in a volatile session and investors looked ahead to the Federal Reserve's policy meeting and Apple's results. Investors are still reeling from a turbulent start to the year, which saw Wall Street post its worst-ever start to a new year. "It's going to go back and forth, and it looks like it's going to all depend on what the price of oil does today," said Matthew Tuttle, chief executive, Tuttle Tactical Management in Greenwich,